Abstract
AbstractRecent analyses of the distortion of shafts made of the steel 20MnCr5 showed a bending along their length axis. Metallographic analyses revealed remarkable concentration fluctuations of Manganese and Chromium in the shaft center, which could be attributed to macro‐segregations. Its characteristic rectangular shape correlated with the direction of shaft bending. In order to understand the origin of the rectangular segregation in shafts manufactured from hot‐rolled round bars and to determine the influence of the forming process on the found distribution, a Finite element (FE) analysis of the whole hot‐rolling process was carried out. The results show a significantly inhomogeneous strain distribution at the shaft cross‐section, which provides a distortion potential for a preferred shaft bending direction. Further it was found, that the forming process influences the shape of the macro‐segregation in the shaft center, but the analysis hints in this case on an origin of the rectangular macro‐segregation in continuous casting.
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